I agree with others - N200 in a long run is a better choice. With A200 when you get an external DAC you will end up having its DAC section unused but on and consuming power. That would potentially make the overall noise floor with the A200 higher than what you would get with the N200. Will you hear it? May be in direct comparison with N200…depending on the DAC you choose and how resolving the rest of your system is.
One other suggestion - email Aurender and get their take on streamer comparison between the two units. They might shed some more light on the differences.